how can I max horsepower in a 400 sbc - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-24-2011, 04:26 AM
Registered User
 
Join Date: May 2011
Location: Alabama
Posts: 7
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
how can I max horsepower in a 400 sbc

I have a 87 silverado and I want to build a small block 400. How can I max my horsepower in my 400. I would like to get near 500 hp as possible.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-24-2011, 07:23 AM
68NovaSS's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket
Last photo:
Join Date: Sep 2002
Location: Nine Mile Falls, Washington
Posts: 5,223
Wiki Edits: 9

Thanks: 102
Thanked 131 Times in 122 Posts
Short of supercharging or a turbo, 500 hp from a small block will cost and street manners will be minimal at best, but it can be done.

Do a search here, you'll find a ton of information.
__________________
Boost adds dignity to what would otherwise be a vulgar brawl...

Midnight Sun Street Rod Association
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-24-2011, 07:42 AM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Pittsburgh, PA
Age: 40
Posts: 5,128
Wiki Edits: 16

Thanks: 0
Thanked 2 Times in 2 Posts
Open the big wallet and prepare for terrible streetability.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-24-2011, 08:02 AM
eloc431962's Avatar
Evil Wicked Mean And Nasty
 
Last wiki edit: Pilot bearing and bushings
Last journal entry: roof repair
Last photo:
Join Date: Nov 2008
Location: back in the garage.
Posts: 13,762
Wiki Edits: 37

Thanks: 50
Thanked 28 Times in 24 Posts
You can get near and even past the 500hp mark, like stated if the funds are there. trust me i have been there
Do you have any performance parts now for this build or starting with just the block ?



Cole
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-25-2011, 04:45 AM
Registered User
 
Join Date: May 2011
Location: Alabama
Posts: 7
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
yes I was thinking it would cost a lot but I want to try it anyway. I'm starting with just a block.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-25-2011, 07:21 AM
eloc431962's Avatar
Evil Wicked Mean And Nasty
 
Last wiki edit: Pilot bearing and bushings
Last journal entry: roof repair
Last photo:
Join Date: Nov 2008
Location: back in the garage.
Posts: 13,762
Wiki Edits: 37

Thanks: 50
Thanked 28 Times in 24 Posts
Quote:
Originally Posted by devarsity61
yes I was thinking it would cost a lot but I want to try it anyway. I'm starting with just a block.
The first thing you need to do is have it verified from a machine shop that the block is in good shape for the build. JMO Then you can start gathering up some parts needed to reach your goal with the engine. And the parts have to match up to perform properly, you can't just go throwing parts at it expecting to get the HP you want, with that said have the block checked and then post back and we will do all we can to help you with this build.



Cole
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-25-2011, 02:10 PM
V8 Super Beetle's Avatar
VW makes it, Chevy shakes it..
 
Last photo:
Join Date: Jan 2008
Location: Houston, TX
Age: 33
Posts: 1,245
Wiki Edits: 0

Thanks: 5
Thanked 0 Times in 0 Posts
A good set of heads with the appropriate matching parts would get you there. Check out AFR's Dyno page. 503 hp out of a 383. So with a 400...........

http://www.airflowresearch.com/chevy_dyno.php
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-26-2011, 06:48 PM
Registered User
 

Last journal entry: Got it running
Last photo:
Join Date: Jun 2006
Location: Arkansas
Posts: 191
Wiki Edits: 0

Thanks: 16
Thanked 6 Times in 3 Posts
Supercharger plus nitrous. Max power, min life.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-27-2011, 03:27 AM
willowbilly3's Avatar
Member
 

Last journal entry: Body mods
Last photo:
Join Date: Jun 2004
Location: Black Hills, South Dakota
Age: 61
Posts: 1,208
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Best thing would be to throw away the 400 block you have and buy a big block crate engine. A nice civilized 502 would make that kind of power, be a lot easier on the wallet with a much lower frustration level. Also think about the rest of the driveline you will need to stand up to 500 hp. A fairly expensive tranny rebuild or replacement and for sure a whole new rear end.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 05-29-2011, 11:32 PM
Registered User
 
Join Date: May 2011
Location: Alabama
Posts: 7
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
ok I have a good 400 block that is ready to have machine work done. I also have some vortec heads that need to be worked. what are some ideas for the block and heads. I would like to stroke the 400 to a 406 what do u think
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 09-16-2012, 08:07 AM
Registered User
 
Join Date: Sep 2012
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
For sure spend the money to have it hot tanked and crack checked.I have put a lot of 400s together and for the street we used a 480 hyd cam,ported stk heads.the 400s really hold up well with5.7 rods,I always use head studs on them to help with gasket issues.I had a cam special ground for another one that went into my camaro wow pump gas and really worked well
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 09-16-2012, 08:12 AM
Registered User
 
Join Date: Sep 2012
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by Ruthlessmr View Post
For sure spend the money to have it hot tanked and crack checked.I have put a lot of 400s together and for the street we used a 480 hyd cam,ported stk heads.the 400s really hold up well with5.7 rods,I always use head studs on them to help with gasket issues.I had a cam special ground for another one that went into my camaro wow pump gas and really worked well
I run a 700r4 with them no stall. The400s have great tourqe .
I had one stock rod400 with arp bolts that got the living dogs not beat out of it daily.Ifreshened it up about every two years just to keep ontop of it..It lasted 15 years that way and went into 5 different cars
love them 400s
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 09-16-2012, 08:13 AM
Registered User
 
Join Date: Sep 2012
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by willowbilly3 View Post
Best thing would be to throw away the 400 block you have and buy a big block crate engine. A nice civilized 502 would make that kind of power, be a lot easier on the wallet with a much lower frustration level. Also think about the rest of the driveline you will need to stand up to 500 hp. A fairly expensive tranny rebuild or replacement and for sure a whole new rear end.
Come on man maybe if he wants to add weight
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 09-16-2012, 08:16 AM
Registered User
 
Join Date: Sep 2012
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by devarsity61 View Post
yes I was thinking it would cost a lot but I want to try it anyway. I'm starting with just a block.
2 bolt main or splay the caps
4 bolts suck(warp,pull out main bolts,etc.)
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 09-16-2012, 08:18 AM
Registered User
 
Join Date: Sep 2012
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by devarsity61 View Post
I have a 87 silverado and I want to build a small block 400. How can I max my horsepower in my 400. I would like to get near 500 hp as possible.
Plan on doing the 700r4 also or it won't hold stock,shift kit perf clutches,servo
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
how much horsepower kingj Hotrodding Basics 10 12-31-2008 05:37 PM
horsepower oldschool Engine 3 01-10-2006 07:46 PM
how much horsepower kingj Engine 1 12-12-2005 03:48 PM
Horsepower.... and horsepower loss PonchoTA79400 Engine 3 03-13-2004 09:25 AM
need more horsepower armyaj33 Hotrodding Basics 9 02-20-2004 11:57 PM


All times are GMT -6. The time now is 10:37 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.